5d232331 added default /var/log/messages rotation, which does not signal to rsyslogd to re-open the log file, causing it to write to a non-existing FD after rotation.
Revert the commit and tell rsyslog to rotate also messages (which currently does not touch).
Syslog-ng logrotate is configured to rotate also messages, so it should be currently unaffected and it is expected to work properly after this MR is applied.
Affects edge and all stable branches.